<PAGE>
MFS(R) SPECIAL OPPORTUNITIES FUND
Supplement to Current Prospectus
The Board of Trustees responsible for overseeing the Fund is expected
to consider at its next regular meeting on February 10, 1999 a proposal to
terminate and liquidate the Fund, effective February 19, 1999 or as soon
thereafter as is practicable (the "Termination Date"). If the proposal is
approved by the Board, sales of shares of the Fund will be suspended and any
shareholder who has not redeemed or exchanged all shares in his or her account
by the Termination Date will have his or her shares automatically exchanged on
the Termination Date for shares of MFS(R) Money Market Fund.
The date of this Supplement is January 22, 1999.
